25560389 has 2 divisors, whose sum is σ = 25560390. Its totient is φ = 25560388.

The previous prime is 25560349. The next prime is 25560463. The reversal of 25560389 is 98306552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21390625 + 4169764 = 4625^2 + 2042^2 .

It is a cyclic number.

It is not a de Polignac number, because 25560389 - 2⁸ = 25560133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25560319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12780194 + 12780195.

It is an arithmetic number, because the mean of its divisors is an integer number (12780195).

Almost surely, 2^25560389 is an apocalyptic number.

It is an amenable number.

25560389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25560389 is an equidigital number, since it uses as much as digits as its factorization.

25560389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 25560389 is about 5055.7283352649. The cubic root of 25560389 is about 294.5704329104.

The spelling of 25560389 in words is "twenty-five million, five hundred sixty thousand, three hundred eighty-nine".